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Tire Burst...

Old 11-22-13, 08:29 PM
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Tire Burst...

I aired up the tires on my wife's cruiser. Put 60 PSI, sidewalls say 65 PSI is max. We went for a ride, about 4 miles and came home. After about an your, the tire just exploded, very loud, like a gun being fired. Tore the tube up and tore a piece of the tire. Replaced the tire and tube, put 60 PSI and it seems that all is well. What would have made the tire burst like that.
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Old 11-22-13, 09:02 PM
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Blowouts have 2 basic types. Blow off, where a tire slips over the edge of the rim and blows out. And true blowouts, where the tire itself ruptures.

Blowoff is usually because of poor mounting and seating, usually with part of the tube trapped under the tire, and helping to lift it when inflated to pressure.

Blowout is because of damage to the fabric plies which give tires their structure. This can be because of age, getting creased against the side of the rim when ridden at inadequate pressure, or the cords being cut by a road hazard such as glass.

If the tire seems to be intact, you can probably reuse it, but care in mounting is key -- also applies to the new tire. OTOH- if the tire's wall is blown out and damaged the tire is toast.
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Old 11-23-13, 09:36 AM
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Tire blowouts due to mfr. defects are extremely rare. But as FBinNY pointed out it could be an old or damaged tire or mounted wrong with the tube pinched. Highly unlikely but if your pressure gauge is waaay off the tire could be overinflated but it would probably have to be over 90psi (just a guess) to cause it to fail. Tubes can suddenly fail due to defects but most blowouts like that are due to the tube getting stuck under the bead of the tire which will work for awhile and then suddenly fail in a big boom. As long as the new tire and tube are installed correctly you shouldn't worry about it happening again. Ride and enjoy.

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Old 11-23-13, 01:56 PM
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"Improper mounting" can include such things as letting a bicycle sit on tires with all the air having leaked out. The tube may become trapped under the tire bead when refilling if you don't treat it as a new installation and make sure the bead seats properly as you fill with air.
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Old 11-23-13, 02:39 PM
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Originally Posted by Surfmonkey
I aired up the tires on my wife's cruiser.
Clue could be in the first words, as others have said, tire walls can be compromised if they have sat flat for some time, that would be my guess.
have faith in your new tire, as long as you don't let it go proper flat and sit there.
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Old 11-23-13, 04:46 PM
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I have on rare occasions got a new tire that just would not seat properly in one area, presumably manufacturing defect. If this was a new tire, that could be the case, if an old tire, probably not.
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Old 11-24-13, 12:09 AM
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If the tires are old, the rubber can crack and and break off in chunks thereby exposing the fabric which can be worn away while riding.

The other thing is on a cruiser, you probably don't need to inflate to 60 PSI. I'm guessing these are 26x2.0 tires or something close to that. Even if you inflate to 40 PSI, you'll be fine for just about anyone under 200 pounds. Above that won't make the ride any easier but will make the rider harsher.
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Old 11-24-13, 12:48 PM
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Tube pinch?
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